The military testing new experimental weapons, and doing so in a quarantined tow

The military testing new experimental weapons, and doing so in a quarantined town, cut off from the outside world by a concrete wall. They are purposely spreading virus into this town, watching from the outside how it will affect people. The result was unpredictable. Some people have turned into evil zombies, while others have simply become crazy. Destroy all malicious zombies, and do not let the virus spread further.